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PROCEEDINGS OF THE NATIONAL MUSEUM 



Abdomen black except the first tergum, which has two large 

 lateral yellow patches; terga 2 to 5 are mostly yellow with black 

 emarginations basally; tergum 6 mostly yellow; venter with more or 

 less emarginate yellow bands on sternites 2, 3, 4, and 5 and small 

 lateral yellow spots on sternite 6; pygidimn with sides subparallel. 



The extension of the yellow markings varies. This is especially 

 true of the terga. C. eurymele Banks represents the extreme yellow 

 form. The shape of the clypeal process on the female is quite variable. 

 A series of specimens collected by F. X. Williams on the sand hills of 

 San Francisco show noticeably longer pubescence. In recent years, 

 colonies on these sand hills have been eliminated by expanding resi- 

 dential districts. 



Types. — A male specimen of Saussure's original type series of 

 C. tepaneca at Vienna, described from Orizaba, Mexico, has been 

 designated a lectotype by the present writer. The type female of 

 C. sextoides Banks, from Lone Tree, Yakima River, Wash., June 30, 

 1882 (S. Henshaw), and the type female of C. eurymele Banks, from 

 Davis, Calif., June 30 (Bohart), are at the Museum of Comparative 

 Zoology, Harvard, nos. 23547 and 23546, respectively. 



Distribution. — Throughout the Pacific Slope States, from British 

 Columbia south and into Mexico. 



Figures 96-98. — Localities of: 96, C. tepaneca Saussure; 97, C. texana Scullen; 98, C. tolteca 

 Saussure. 



Prey record. — Sitona californicus Fabricius (Antioch, Calif.). 

 Trigonoscuta pilosa Mots (San Francisco sand dunes, Calif.). 



Plant record. — Baccharis Emoryi (California), Chrysothamnus nau- 

 seosus consimilis (California), C. viscidiflorus (California), Croton 

 californicus (California), Daucus carota (Oregon), Eremocarpus sati- 



